>> paula, thank you. >>> on cnn's fareeda zakaria, he talks about the difference between two worrisome nations. >> if i look at the intelligence that one gets and reads, it subjects there are a few hundred -- by your own admission, that's probably more than there are in afghanistan, yet we have 100,000 troops in afc. wile not take a much more aggressive approach in yemen? >> again, it's a sovereign country. we have great respect for the president there in terms of his judgment, in terms of what he needs to do this, and right now as far as any kind of boots on the ground there with respect to the united states, that's just not a possibility. i mean, we're not into those kinds of discussions. in all of these -- in all of these fights with al qaeda and with terrorists, it is typically relatively small numbers, nimble, agile, very capable, cunning, and they have studied us and they adjust, and so typically there does take larger numbers to get at thought. in the case of afghanistan, where you talk about we've got between ourselves and nato and other countries who are actually contributing